I have been trying to synch my carbs for the last week and they seem to have a mind of their own. I followed various instructions posted on the ABB along with various publications; yet it just doesn't happen! The engine keeps rocking side to side. In the Brookland service manual, they tell us to disconnect the throttle linkage and back off the idle screw and the synch screw almost all the way out. Then it tells us to push down on the rear carb throttle lever to make sure the linkages are free. Then screw in the synch screw until it touches the throttle plate of the other carb. Then screw in the idle speed screw until it touches the carb throttle lever and add an extra 1/2 turn. Then attach and adjust the throttle link but adjust it just enough to give it a pre-load on the carb throttles. This sounds pretty straight forward. However, there are other publications that does not mention anything about disconnecting the throttle linkages. I did however notice that the linkage ends on my car are very look and sloppy. When I set the synch., I can disconnect the linkage ends with ease. After doing so, there is absolutely no change in the carb's RMP. I also noticed that the bell crank ball is also loose. There is in and out play in the pivot ball where the carb center link connects to. Is this enough play that would hinder the carb synchronization???